Saw sharpening machine



Aug. 22, 1950 A. J. BOUTIN SAW SHARPENING MACHINE 9 Sheets-Sheet 5 Filed Aug. 20, 1948 Arthur J. Bouh'n INVENTOR.

9 BY fiawmdh Aug. 22, 1950 A. J. BOUTIN 2,519,

, SAW SHARPENING MACHINE Filed Aug. 20, 1948 9 Sheets-Sheet 4 Ari/2w J. BOUf/n 1N1 'EN TOR.

(ll/Willi- Aug. 22, 1950 A. J. BOUTlN 2,519,

SAW SHARPENING MACHINE Filed Aug. 20, 1948 9 Sheets-Sheet 5 IN V EN TOR.

BY Qmaoiiw.

Wis way fiM Aug. 22, 1950 A. J. BOUTlN SAW SHARPENING MACHINE Filed Aug. 20, 1948 9 Sheets-Sheet 6 a H on? g S, Q NR mm mv vn mmw An ur J. Bout/n INVENTOR.

BY WWW 29M.

Aug. 22, 1950 A. J. BOUTIN 2,519,735

SAW SHARFENING MACHINE Filed Aug. 20, 1948 9 Sheets-Sheet 7 av. v Q Q 1% Q k Arthur J. Bout/n 1N1 'EN TOR.

Aug. 22', 1950 Filed Aug. 20, 1948 A. J. sou-rm 2,519,735 SAW SHARPENING" MACHINE 9 Sheets-Sheet 8 :1 340 Fig. .9.

Arthur J. Bout/n I INVENTOR.

BY 2mm Aug. 22, 1950 A. J. BOUTIN 2,519,735

SAW SHARPENING MACHINE Filed Aug. 20, V1948 9 Sheets-Sheet 9 Arthur J. Bout/n INVENTOR.

3 dinal sectional view taken substantially on the plane of section line 8-8 of Figure 7;

Figure 9 is a fragmentary, horizontal, longitudinal sectional view taken substantially on the plane of section line 9-9 of Figure 7;

Figure 10 is an enlarged detail sectional view illustrating the means for advancing the carriage relative to the stationary bar, and the releas means therefor;

Figure 11 is a group perspective view showin the elements employed for advancing the carriage in a step by step movement on the rack bar and for releasing the carriage moving mechanism;

Figure 12 is a perspective view of the cutter or tool supporting element that is used in conjunc tion with the present invention;

Figure 13 is an enlarged fragmentary side elevational View of the reciprocating link that is associated with the cutter oscillating mechanism and illustrating the connecting pin employed therewith;

Figure 14 is a fragmentary perspective View of the cam wheel that is employed in conjunction with the present invention for oscillating the cutter support;

Figure 15 is an enlarged fragmentary elevational view illustrating the saw set actuating mechanism; and,

Figure 16 is a perspective view of the saw teeth setting member and showing the same applied to a hand saw.

Numeral I0 represents a substantially rectangular base plate that is supported in an elevated, substantially horizontal position by a suitable stand or table I2.

Fixed to rear longitudinal edge of the base plate I0, is an upstanding rear guide panel I4 the upper portion of which engages a longitudinal recess or notch I6 that is provided in the rear portion and underside of a longitudinal movable or slidable carriage I8. The forward portion of the carriage I8 is also provided with a longitudinally extending, substantially V-shaped roove or recess 20 in its lower surface that slidably receives an upstanding substantially V-shaped forward guide strip 22 which is integrally formed with the upper face of a longitudinal strip or beam 24 that is suitably fixed to the upper surface of the base plate I0 adjacent the forward longitudinal edge thereof.

A pair of angle members 26 are removably secured to the upper surface of the base plate I0 adjacent the transverse edges thereof, and the upstanding or vertically disposed legs of these angle members 26 are apertured to receive the reduced portions 30 of a longitudinall disposed stationary rack bar or annularly toothed cylinder 32 which is positioned above the base plate I0 and which loosely engages a longitudinal recess or channel 34 formed in the upper surface of the carriage I8 intermediate the forward and rear portions of the same, as shown best in Figures 1, 4 and 7 of the drawings.

Motor mounting Supported by the concaved or downwardly arcuated web portions 36 of a plurality of substantially U-shaped frames or straps 38 having outwardly turned end portions 40 which are bolted to the carriage I8, is a preferably electric motor 42 that includes a drive shaft the terminals of which project outwardly therefrom and are indicated by the numerals 44 and 46.

A gear housing 48 is suitably mounted on the carriage I8 at the rear portion thereof, adjathe drive shaft of the motor 42 is being rotated.

Carriage actuating mechanism Removably secured to the forward portion of the carriage I8 are the flanged portions of a pair of longitudinally spaced, upstanding post and 62, one of which for example post 60, rotatably supports a main drive shaft '64 the forward terminal of which is provided with a finger grip or wheel 66 having a projecting lug 68 for manual rotation of the shaft 64.

A first clutch plate I0 is suitably mounted on the main drive shaft 64 and normally engages a complementary clutch plate "I2 slidably keyed to and rotatable with the forward shaft 58 of the gear housing 48. A collar I4 is rotatable with and slidable on the shaft 58, and is urged by a coil spring 16 embracing the shaft 58 against the clutch plate 12 to normally engage the clutch plate 12 with the clutch plate I0.

An upstanding bracket 18 is secured to the carriage I-8 and pivotally supports one end of a link '80, the free end of which supports a pin 82 that engages an annular groove 84 provided in the collar I4, see Figure 1.

Slidably supported by a pair of transversely spaced guide brackets 86 and 88 that are secured to the carriage I8, is an operating rod 90 that is pivoted to the link,80. This rod is provided at its forward terminal with a finger grip 92 that is pushed inwardly to actuate the link 80 and thereby disengage the clutch plate 10 with the clutch plate 12 to prevent rotation of the drive shaft 64.

The brackets 86 and 88 rotatably support a shaft or bar 94 that is spaced parallel to the rod 90 and which supports a laterally projecting arm 86 that is pivoted to one end of a downwardly inclined push rod 98. A hand grip 99 is mounted on the bar 94 for actuating the same.

v Embracing the rack bar 32 is an expandible and contractible, resilient sleeve I00 having a plurality of circumferentially spaced, longitudinal slits I02 that will permit the said sleeve to be expanded in a manner presently to be described. An annular groove I04 is provided in the enlarged head or end portion I06 of the sleeve I00 and receives a split, annular spring I01 that normally retains a plurality of annular teeth I08 on the inner surface of the head portion I06, complementary to the teeth on the rack bar 32, engaged with the teeth of the rack bar 32, as shown best in Figure 10 of the drawings.

A collar or ring IIO embraces the sleeve I00, bears against the head portion I06 of the sleeve I00, and a bearing surface III of the carriage, and is removably secured on the sleeve I00 by a lock nut II2 that receivably engages the externally threaded end portion I I 4 of the said sleeve Loosely embracing the rack bar 32, is a cylin der IIB having a tapered end portion H8 that is engageable with the inwardly tapered inner surface I 20 of the head portion I06, in a wedgelike manner, to spread or'expand the sleeve I00 whereby the toothed inner surface orthe head portion or teeth I08 will disengage thewteeth of the rack bar 32 and the carriage It; may be moved manually in a longitudinal direction. I

The cylinder H6 is provided with apair of spaced, annular ribs I22 between which there is engaged the spaced leg portions of a yoke I24, the ends of which are pivoted as at I26 to ears I28 that depend from the carriage I8, see Figure 10.

Fixed to and projecting upwardly from the web portion of the yoke. I24, is a lever or arm I36 that is pivoted to. the free, angulated end 1.32 of the push rod 98. Extending into andpivotally secured to the inner walls of the longitudinalr'ecess 34,215 at I33, are the. oIT-set endportions. of a pair of upstanding arms I34 that are connected at their upper terminals byi a roller or bearing element I36. which is engageable. with a substantially heart shaped cam I 38 that is. removably secured on the main drive shaft t64, see Figure Pivoted to the arms 1:34, is a pair of connecting links I46 the free eyelends of which arepivotally and removably secured to lugs. I42 that. project outwardly from diametrically opposite sides-of the collar H6, see. Figure 11.

Resilient members or-- coil springs IM-i are anchored tothe carriage I8 and the links I46 to normally urge the arms I34 upwardly "and: the roller I36 against thecain I38.

When the apex ofthe cam I38 engagesthe roller I36, during rotation of the maindrive shaft 66, the arms I34 willpivot; against: action of the Springs I44, and the links I40; collar- III] and sleeve IE!) will move on the rack bar 321the dis-'- tance of one tooth thereof eachtimetheapexof the cam I38 engag'es theroll'er l36 upo'n the upward swingof the arms I34 due to the springs I44; This is best illustrated inFigure 10 0f: the drawings wherein the carriage I8 an'd's1eeve I06 will'move from-left to right duringv'the upward pivotalmovement of-- the arms I46 which; as shown, are urged downwardly by the cam I38.

As the push rod 98 is actuated'to the left, in Figure lq thezreleaser or cylinder I I6-- will, be or e to t ehtah i eetauere nch i s.- of willengage the inwardly tapered surface lm of, the he d por on I 06 pr adin e and ne the sleeve I06 and thus permitting the carriage. I8; andslee e I00 to be moved freelyvsi-nce-the sleeve I06 is no longer lockedon therack bar 32.-

tt suppor Removably securedto 'the opposin'g surfaces of the p0stsv66 and 62, in. anysuitablemaimer; is a pair of spaced parallel, substantially vertical guide bars I46: havinglongitudinal V-shaped grooves I48 that opposelcomplemental V shaped grooves I50 formed in th'e'outer facesofapair of guide bars 'or strips I52 which are fixed to the :ends" of an upper substantiallychannel: 'shaped 'memj ber I54 and a lower, annular channel shaped member I56.

Anti-friction elements l or- -balls I 58' are-= posi= tioned in the grooves" llai and "I50 orsockets movement with the same and for rotary move 'mentlrela'tiv'e to the said bars I52, through the medium of a plurality of annular bearings indicated generally by the numeral I62, is a cylindrical casing or support I 64,'see Figure 7.

-.eum al 16. rep e a subs n i ly shaped member that is disposed within the casing .1 n g ion of t e mber its or, .example leg I 68 is provided with a lateral projection I16 that i s fixed by welding or the like to the inner periphery ofthe v casing I64; p l.,v'- .e re a n 162 I12 o t ememberv l'fifiais elongated, and terminates in an enlargedextens e {Ii-shav n oo inlwhich. here is fixed a semi-cylindrical bearing I76 Aplate' I'l -'8 is removably; secured to the extension I14 and ,is formed with a groove that en a esa semi-cylindrical bearing I80 that imposes the bearing. H6 and'which cooperates with the. bearing; I 16: to rotatablysupport a cutter holding shaft I82=,:th'at is. supported by a bearing I;83:,depending from one; guide I 52-, see Figures 5-and 12. v

Integrallyv formed with and projecting laterally from the leg I12;- is; a substantially horizontal arm I84 that is fixed to the casing and which is provided'with a-socket I86 intermediate its ends that receivesa bearing sleeve I88.in which there is rotatably supported, a shaft] I96 the. lower terminal of which. removablyi carries a beveled gear I62 that engages and is meshedwith-afu'rther beveled gear I94mounted onithe cutter holdingsliaft' I96". A further arm I98'i's rigidly attachedtoon forms an "integral part ofthe leg" I12. Tsisntstsm; I596 is spacedabov'e' anepa 'ne 'te the-arm; I64;

'I and terminates in an nlargdextens'ion "z'oahav;

ing aconcaved outer facev that engages asemicylindricalibearing sleeve-262; p w it A holding plate 264'is removably secured tothe extension 260 and includes a:recess;inits inner face to which there is. fixedza semi-cylindrical sleeve orlj ournal bearing 26$:that cooperates-with sleeve 202- to. embrace and rotatably supportthe aft V a y l l w Rota'tably positioned in a socket 2II8 --f0rmed tin the web portion of the member. I66, is the-lower end of a shlait .210 on which there; is removably sec e -en nn ler eeri hat-engages nan-: nular gearw 2I'4 mounted on the upper terminal mes g :1. 4, a, l. I

Eixed by welding or-Y thelike to the inner periphery of the casing I64- at the- :,upper end theregf,, are the radial-arms or finS' ZIE-qof, a pider 2 :v t alc n al 1 1v r on f; which rotatabl'y supports a'reduced portion ofthe shaft 2), see Figure; 5. p I 7.

An upper annular channel member 220ais welded-or otherwise; fixed to the outer periphery of; the casing 64 and opposes a; furtherannular channel member 222 .that is -fixed; tothe strips I 52,; Suitable ball ,bearing ;races,224 are engaged in the channels 220 and 222 to permit theacasing' I 64 -to rotate or oscillate relative tothestripsi-I52.

Also 'fixed-xto the outer peripher'ytof the casing. I

I64, beneath-the channel 222, is the-web "portion era-another: annular channel member 226 thatbers 226 and 228, is a .fur'theripair of companion:

ball races 2'3 05 that :assuine :vertica-l'ithrust and 'aid in: supporting ether-rotary ori :os'cillatory' motion" of the casing il64l Th'e. -aforementioned channel: member! I56 opposes a further :annular :channel n'iember 232i fixed .ito ltheouter periphery :of the 1:asing 164' atiaias at the lower end of the casing and these members I56 and. 232 support annular ball races or bearings 234.

Cutter dri'zjing mechanism A rotary shaft 236 is connected by an universal coupling or joint 236 to the terminal 46 of the motor 42 and the free squared terminal 246 of the shaft 236 slidably engages thesubstantially square socketed end 242 of another shaft 244.

Journaled for rotation in a bearing 246 carried by the upper channel member I54 is a driven shaft 246 one end of which is disposed in'the channelmember I54 and supports a beveled gear 256 while the remaining and outer end is coupled to the shaft 244' by a universal joint 252.

The beveled gear 256 engages a companion beveled gear 254 that is mounted on the upper terminal of the shaft 2I6 whereby the drive shaft of the motor 42 will rotate the shaft 248, the shaft 2I6, the shaft I96 and hence the shaft I82 on which there is mounted a suitable cutter blade, abrading wheel or tool 256 that loosely engages and rotates between the legs of the member I66.

Cutter raising and lowering mechanism Removably secured to the carriage I8is a supporting post 258 on which there is secured a platform 266 that holds a bearing 262 for a substantially vertical shaft 264 having a beveled gear 266 mounted on its upper terminal.

A substantially horizontal shaft 268 that is rotatably supported by a bearing 216 mounted on the platform 266 and a channeled cross member 212 that is fixed between the upper portions of the guide strips I46, and this latest shaft 268 retains a beveled gear 214 that engages the beveled gear 266.

Pivoted as at 216 between the sides of the cross member 212 is one end of a lever 218 having an arcuate end portion 286 that bears against a, cam 282 which is mounted on the shaft 268.

Intermediate the ends of the lever 218 there is provided an internally threaded sleeve 284 that is pivoted to an externally threaded rod 286 the lower reduced end of which is swiveled as at 288 in a socket 296 fixed to the channel member I54.

A stop and hand grip 292 is fixed to the upper terminal of the rod 285 and limits the downward travel of the rod 266 the casing I64 and its associated parts including the cutter or tool 256.

A bearing plate 294 fixed to the channel 212 engages the stop 292 to limit the movement of the rod 286 and is formed with a longitudinal slot that will permit vertical movement of the arcuate portion 286.

The web portion of the member 212 is also provided with a longitudinal slot 286 that will permit rotation of cam 282 without the necessity of having to exercise the depth of the said channel member 212.

When the shaft 268 is in motion, the apex of the cam 262 will engage'the finger or arcuate portion 286 of the lever 218 to pivot the lever 218 upwardly about its fulcrum 216 thus raising the rod 286 and the casing 164. As the apex of the cam 282 passes over the portion 286, the lever 218 willmove to its normally lowered position together with the casing I64.

The lower terminal of the vertical shaft 264? is journaled for rotation in a bearing 298 mounted on the post 258 and supports a beveled. gear 366.

A pair of opposed bearings 362 are secured to side walls 364 that project outwardly from the post 258 and rotatably. receive a shaft 366. on

which thereis disposed a beveled gear 368 that engages the gear 366.

Y One terminal of the shaft 366 forms a support for a. beveled gear 3! that-engages the beveled gear 3I2 on the main drive'shaft 64 and the remaining 'terminal'of the shaft 366 is journaled in a bearing 3I4 that is mounted on the carriage I 8,- see Figure 6.

Cutter oscillating mechanism Pivoted to the bearing 3I4, is an upstanding link 3I6 that is slidably connected to one terminal of a push link 3I8 as at 326. This push link 3I8 isiprovided with a longitudinal slot 322 that slidably engages a pin or bolt 323 projecting upwardly from a :bearing block 324 which is mounted on the carriage I8. The free terminal-of the link 3I8 is provided with ail-aperture 326 that receives the shank portion328 of a headed pin 336, and this pin 336 is retainedrelative to the link 3 I 8 by a removable holding pin 332 that extends through the link 3I8 and the shank portion 328, see Figure 13.

'One eye end of a connecting link 334 is removably secured to the laterally projecting arm I16 of the member I66 by a bolt 336 that receivably'engages an internally threaded recess 338 provided in the arm I16, see Figure 12. The remaining eye end of the connecting link 334 pivotally secured to the shank portion 328 of the pin 332, see Figures 7 and 9.

Removably. securedon the shaft 366, is a wheel 346 having a recess that forms a continuous cam surface342, as best shown in Figure 14, which engages a bearing pin 344 carried by the link 3I6, see Figures 6 and 9.

As the shaft 366 rotates, the pin 344 engages and follows the contour of the cam surface 342 reciprocating the link 3I8 and pushing the link 334 which will impart an oscillatory motion to the casing I64 upon a reciprocation of the casing to bevelon opposite sides of the teeth of saw.

Saw set mechanism Rotatably supported by a. pair of bearings 346 and 348' is a longitudinal shaft 356 on which there is fixed a cam 352, and a beveled gear 353 that engages a beveled gear 355 mounted on the shaft 64. v

Embracing the cam 352, is a substantially U- shaped channel member 354 having an elongated leg portion 356 that is pivoted to spaced ears 358 that project outwardly from the bearing 348. Opposed rollers 366 are supported by the legs of the member 354 for engagement by, the apex or lobe of the cam 352 and the end thereof opposite said apex and thus oscillating the member 354 in a smooth uniform arc, see Figures 3, 7 and 15.

The lower terminal of the leg portion 356 of themember 354 is pivoted to a pitman 362 that supports a pivoted member 364 which is pivoted to the carriage I8 as at 366. The lower reduced and flat end 368 of the member 364 is pivoted to the reduced upper end 316 of a saw tooth bending or setting member 312 having a key slot 314 in its lower. end that includes complementary gripping jaws 316, see Figure 16.

As the member 354 is oscillated, the pitman 362isreciproeatedandthe member 312 is oscillated or pivoted to bend or twist the teeth 318 of a saw blade "386 a, predetermined vdistance, thus setting the teeth of the saw blade 388.

Fixed to thelower surface of the base plate I6, is a bendable sheet of preferably metallic material 382 the [rear longitudinal edge of which Is 9 turned upwardly to provide an: arcuate. trough that: is spaced from the rear longitudinal edgeot. thebaseplate I 0;

Depending from the forward portion or the stand 1:2; is; an elongated, channel shaped: trough; 3.86 that is; provided with a, drain 381-. Theiouter forward portion- 388 of the; trough. 386: is flared outwardly to receive a:- suitablessolutionfor cooling, the sawblade during thesharpening thereof.

Inorder to retain: the saw relative; to: the base plate i0; andstationa-ry theretoythere. is provided a pair of pivotally connected clampingjaws- 39-0, and! 392- that. are: disposed within. the; forward trough 386-. A- connecting; belt 394. is pivoted to the. jaw: 399; extends through aperture provided in the jaw 3.92 and theiorward wallofi the trough 386; and is externally threaded to receivably engage'alock nut 396;

A coil spring: 398: embracesthe bolt-andiiszbiasedbetween. the; sa-id. jaws tonormallyretain the samespread relative-toeachnther;

The free end: of the jaw 39W extends through arropening 4.00 in the; base Ill and bears against theguide Z4-,.andthe jaW 392 supports-ablock 40% that: bears against the saw 3.80: to-clampthesaid 'saw between-theblockAOZ and the outer facesof. the guide 24 and base,- plate." ill, see Figures 2 and'l.

In; practical. useof thepresent-invention, the saw 380 is clamped by the jaws 39B and 39Z.to:the base plate, Mlv and the carriage l8. is-moved-to'the left.asshowninfligurerlh The motor 42. is energized-btdefifect. a rotation at the. mainv drive shaft 64. and, the. carriage WiILbaadvanced in. a step by step. movementon the. rack bar 32,.as previously described Simultaneous with theadvancementof. the carriage. la, the, shaft. 2A8. will be. rotated. to. engage the; cam. 28D and imparta. reciprocating, movement, to the, tool. support. causingv the same. to riseover. each. successive toothofthe saw. as the carriageisadvanced.

When the, wheel or tool256, is in its uppermost position, during, the reciprocation; thereof, the carriage is movedon, the rack bar andlthe. wheel is, in position to engage thenextsaw tooth.

During, the above. operation the wheel 256. is oscillatedapproximately 15 from the saw by ac.- tion of thecam MIL the cam action continues, and the wheel 255 is. lowered to bevel a further tooth. l

The wheel 256' thenrises again. and reverses oscillation to opposite side of saw and continues on along the sawfully automatic to. sharpen the bevelorr opposite sides ofthe teeth of the saw; 7

When apredetermined numberof teeth have been ground or sharpened} the saw setting me'chanism will be actuated by cam 352; synchronized with the oscillating and reciprocating I motionof the wheel- ZSF-s'ettingtligsawteeth as'previou's-ly described;

' (Dbir-iously; the presentinvention is: applicable for cutting newsteethfon blanks aswellifaszrebox-saws. I

Alsuitablesdressing meohanismAM-is applied-to theibasevplate I0 and-will function intheusua-l manner-p for dressingthe: object worked by the presentimachineestrncturez (See-Figure 1.).

In order. to. move the carriage, it. manually, thereeis provided a. pair. oi. yokese or brackets; 4 0S and. 41113; that. are suitablyv secured. to the. angle members-26,.as best shownein 'Figure 6'of the drawings Sprocketsv 41D and. llz'are journaled for rotation between thelegs of; the. yokes. 40.6.

' sharpeningrsawsrsuchs asicrosse cut; .ripiandtmitre 10* and 408=and alinkchain. 41-4. is; trained. over the sprockets lllland. 41 2'.

Alink chain didisanchored atone. end to the upper flight oi the chain 4, is trainedover a sprocket Md rotatabl-ysupportedorr a bracket 420- depending from the carriage l8, and the free end of the. chain. 41.6 issuitably fixed to the lower portionofthe yoke L24, see Figure L0 A shaft v422 issecured in. any suitable manner to/the sprocket-4.! 21 for rotating. the sprocket 412 and hence the. chain. 41A in either directiom, to pull: the chain 5- downwardly and release the sleeve I00. from the: rack bar 32: ('see Figure 1,0). Ahandgrip 42A isjournalled for rotation on the. shatt4=22 and includes apluralityofcircumferentially spacedlugs- 426- that are adapted tobe received in recesses 4Z8. ina collar 430. fixedion the shaft when the said grip- 42-4-- is employedfor rotating, the chain 416 andmoving the carriage manually (seeEigure 1-).

Having described the invention, what is claimed as new. is;

L. In a saw sharpening: machine, a longitudie nally movable. carriage. means for advancing said carriage in a step-by-step movement;.a--reciproca-tingand oscillating member suppontedon said carriage, means reciprocating said. member, means.- oscillating said. member; a rotaryr tool movable with said member, and meanssupportp inganarticle of workrina stationary position on said. machinato. be engaged by said tool,,whereinsaid means for advancing said: carriage in. a step by stepmovementincluding arlongitudinallydis.- posed annularly toothed stationary bar, an x exipa-nsible sleeve. embracing, said bar. and having internal teeth engageable: with the. teeth on. said bar, acamactuated lever pivoted to the. carriage for moving. said: sleevedn. a stepxby step-move,- ment on-said bar, means normally-retaining said sleeve. contracted; .and. manually actuated means for expanding said sleeve to release the internal teethi thereof. with theteeth ofsaidbar.

2. In a: saw sharpening machine, a longitudinally movablecarriage; means for. advancingsaid carriage. in astep-by -step movement, areciproeating androscillating member supported on said carriage; meansreciprocatingsaid member, means oscillating said member, arotary tool movable with. said. member, and. meanssup-- porting an article of work. in a stationary' sition on said. machine to be engaged by said tool, said means for advancing said: carriage in .a. step. by. step movement including: a. 1011-. gitudinally. disposed. annularlyv toothed station-.- bar, an. expansible. sleeve. embracing said bar. and. havinginternal. teeth. engageable with the teethonsaidbar, acamaotuated lever pivoted. to. the carriage for moving? said. sleeve. in-.a step. by step movement.v one saidbar, means. nor, mally retaining. said. sleeve in a yieldinglyv con-.- tracted position and. a collar. loosely embracing said bar andhaving, a taperedendreceived in one end of said'sleeve for expandingthe same.

3. The combination. of. claim.. 2. andmanually actuated means for moving the. tapered end ofsaid collar into and outotspreading.engagement with said sleeve.

4. In a saw sharpeningmachina.alongituditnally movable carriage,.guides slidably supporting, said carriage, a longitudinally, disposed,- stationary, bar having longitudinally, spaced, annue l'ar teeth, an expansible sleeve embracing. said bar, said sleeve having, internal teeth engaging the teeth. of saidbar, means for expandingsaid sleeve to release the internal teeth. thereof; with the teeth of said bar, a driving member, a pivotal member carried by said carriage, resilient means acting on said pivotal member to normally urge the latter in a raised position, means connecting said pivotal member to said sleeve, a cam carried by said driving member engaging said pivotal member to actuate the latter against action of said resilient means for moving said sleeve in a step by step movement on said bar, an oscillating and reciprocating support movable with said carriage, means operated by said driving member for oscillating said support, further means operated by said driving member for reciprocating said suupport, a tool carried by said support and movable therewith, and stationary means supporting a saw relative to said tool, said tool oppositely bevelling adjacent teeth of a'saw upon reciprocation of said support.

5. The combination of claim 4 wherein said means operated by said driving member for reciprocating said support includes a driven shaft, a wheel carried by said driven shaft, a reciprocating element actuated by said wheel, and means connecting said reciprocating element to said support.

6. The combination of claim 5 wherein said wheel includes a recessed cam surface, and a pin carried by said reciprocating element bearing against said cam surface.

'7. The combination of claim 4 wherein said further means operated by said driving member for reciprocating said support includes a driven member, a further cam mounted on said driven member, and a pivotal element supported relatively to said carriage, said pivotal element being engaged with said support, said further cam engaging said pivotal element to actuate the latter for reciprocating said support.

8. The combination of claim 4 and a saw setting mechanism movable with said carriage, said mechanism including a reciprocating saw tooth engaging member for alternately and oppositely setting the teeth of a saw during longitudinal movement of said carriage. 9. The combination of claim 4 and a saw set-' ting mechanism movable with said carriage, said saw setting mechanism including a substantially U-shaped member having an elongated leg portion, means ivotally securing the elongated leg portion of said U-shaped member to said carriage, rollers carried by the legportions of said U-shaped member, a rotary cam engaging said rollers for imparting a swinging movement to said U-shaped member, a saw tooth engaging member for alternately and oppositely setting the teeth of a saw during longitudinal movement of said carriage, and means connecting said tooth engaging member to said U-shaped member for pivotally actuating the former during the swinging movement of said U-shaped member.

10. In a saw sharpening machine, a longitudinally movable carriage, guides slidably support ing said carriage, a longitudinally disposed, sta tionary bar having longitudinally spaced, annular teeth, an expansible sleeve embracing. said bar, said sleeve having internal teeth engaging the teeth of said bar, means for expanding said sleeve to release the internal teeth thereof with the teeth of said bar, a driving member, a pivotal member carried by said carriage, resilient means acting on said pivotal member to normally urge the latter in a raised position, means connecting said pivotal member to said sleeve, a cam carried by said driving member engaging said pivotal member to actuate the latter against action by riage, means operated by said driving member for oscillating said support, further means operated by said driving member for reciprocating said support, a tool carried by said support and movable therewith, means for supporting a saw relativelyto said tool, said tool oppositely bevelling a saw tooth upon a complete reciprocation of said support, and means for consecutively and oppositely setting the teeth of a saw upon longitudinal, step by step movement of said carriage.

11. In a saw sharpening machine including a carriage and an oscillating and reciprocating tool holder mounted on the carriage, an elongated annularly toothed stationary bar, an expansible sleeve embracing said bar and having internal teeth engageable with the teeth on said bar, a vertically swingable member mounted on said carriage for raising and lowering movement and connected to said sleeve for moving the sleeve upon the bar during raising of said member, means connected to said member and yieldingly urging the member to a raised position, a rotary cam on said carriage and riding against said member to lower the member, and manually actuated means for expanding said sleeve to permit unrestricted movement of said sleeve upon said bar.

12. In a saw sharpening machine including a carriage and an oscillating and reciprocating tool holder mounted on the carriage, an elongated annularly toothed stationary bar, an expansible sleeve embracing said bar and having internal teeth engageable with the teeth on said bar, a vertically swingable member mounted on said carriagev for raising and lowering movement and connected to said sleeve for moving the sleeve upon the bar during raising of said mem-- ber, means connected to said member and yieldingly urging the member to a raised position, a rotary cam on said carriage and riding against said member to lower the member, a collar swingably mounted on said carriage and having a tapered end adapted toenter said sleeve to expand said sleeve, means connected to said collar for moving the tapered end of said collar into said sleeve, and means for retaining the tapered end of said collar within said sleeve and for also moving the carriage when the sleeve is expanded by the tapered end of said collar.

13. In a saw sharpening machine including a carriage and an oscillating and reciprocating tool holder mounted on the carriage, an elongated annularly toothed stationary bar, an expansible sleeve embracing said bar and having internal teeth engageable with the teeth on said bar, a vertically swingable member mounted on said carriage for raising and lowering movement and connected to said sleeve for moving the sleeve upon the bar during raising of said member, means connected to said member and yieldingly urging the member to a raised position, a rotary cam on said carriage and riding against said member to lower the member, a collar swingably mounted on said carriage and having a tapered end adapted to enter said sleeve to expand said sleeve, means connected to said collar'for moving the tapered end of said collar into said sleeve, an endless drive chain on the machine, a connecting chain between said drive chain and said means connected to said collar for retaining the tapered end oi. said collar in said sleeve, and means for moving the drive chain to move the carriage.

14. In a saw sharpening machine including a frame, a carriage movable upon the frame, and a reciprocating and oscillating tool holder mounted on the carriage, an elongated annularly toothed bar mounted on the frame, said carriage having an elongated channel receiving said bar, an expansible sleeve embracing the bar and having internal teeth engageable with the teeth on said bar, a vertically swingable member carried by the carriage and connected to said sleeve for moving the sleeve in a step-by-step manner on the bar, resilient means yieldingly urging the member to a raised position, a rotary cam riding against said member to lower said member whereupon the resilient means will return the member to its raised position and move the sleeve upon the bar, a collar surrounding the bar and having a tapered end for entering the sleeve to expand the sleeve and permit unrestricted sliding movement of the sleeve upon the bar, and a manually actuated drive chain carried by the frame, underlying the carriage and connected to said collar for retaining the tapered end of the collar Within the sleeve and for moving the carriage upon the frame as the tapered end of the collar is held in the sleeve.

15. In a saw sharpening machine including a pair of posts, a tool holder slidably and rotatably mounted on and between said posts, a crossmember joining the upper ends of said posts, a vertically swingable arm pivoted to said crossmember and having a curved end portion, a rotary cam mounted on said cross-member and riding against said curved end portion to swing said arm, a swivel connection between said arm and said holder for raising and lowering said holder during raising and lowering of said arm, and means for oscillating said holder during raising and lowering of said holder.

16. In a saw sharpening machine including a pair of posts, a tool holder slidably and rotatably mounted on and between said posts, a crossmember joining the upper ends of said posts, a

vertically swingable arm pivoted to said crossmember and having a curved end portion, a rotary cam mounted on said cross-member and riding against said curved end portion to swing said arm, a swivel connection between said arm and said holder for raising and lowering said holder during raising and lowering of said arm, a carriage slidably mounted on said frame, an oscillating and reciprocating tool holder carried by and movable with said frame, an externally toothed bar held stationary on said frame, an internally toothed expansible sleeve surrounding said bar, a member swingably mounted on said carriage and connected to said sleeve for moving the sleeve upon the bar, resilient means connecting said member to said carriage and urging the member to a position for pulling the sleeve upon the bar, a rotary cam riding against said member to urge the member toward the sleeve, a manually operated means on the carriage for expanding the sleeve to permit unrestricted sliding movement of the sleeve upon the bar, a means for retaining the manually operated means engaged with said sleeve and the sleeve expanded and for also moving the carriage when the sleeve is held expanded, and an oscillating saw setting mechanism supported solely by said carriage.

ARTHUR J. BOUTIN.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 574,855 Schofield Jan. 5, 1897 1,179,752 Pangburn Apr. 18, 1916 1,480,172 Majewicz Jan. 8, 1924 1,846,331 Hickey Feb. 23, 1932 FOREIGN PATENTS Number Country Date 2,619 Great Britain 1909 

